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2021 Fiscal Year Annual Research Report

A Hybrid Trapped Field Magnet Lens (HTFML): concept and realization

Research Project

Project/Area Number 19K05240
Research InstitutionIwate University

Principal Investigator

藤代 博之  岩手大学, 学長・副学長等, 理事 (90199315)

Co-Investigator(Kenkyū-buntansha) 内藤 智之  岩手大学, 理工学部, 教授 (40311683)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords超伝導バルク磁石 / 磁束ピン止め効果 / 磁気収束効果 / 擬似微小重力 / 磁気レンズ効果
Outline of Annual Research Achievements

REBaCuO系超電導バルク磁石は、「磁束ピン止め効果」を用いてバルク中に15 T以上の強磁場を捕捉でき、医療分野などへの新しい応用が始まっている。一方、超電導コイル磁石が作る磁場を、「磁気収束効果」を用いて内部に設置する超電導バルクで作製された磁気レンズにより磁束線を収束し、強磁場を実現する磁場収束レンズの研究が行われているが、外部磁場をゼロにするとその効果は失われる。本研究ではこの2つの効果を併せ持つ新しいハイブリッド型超電導バルク磁石レンズ(HTFML)において、着磁磁場より大きな磁場を持続的な発生の実証実験と、擬似微小重力環境を実現する新しい超伝導バルク磁石(HG-TFM)の提案、シミュレーション解析と実証実験を行い、以下の結果を得た。
1)電磁界及び応力解析シミュレーションによるHTFML構造の最適化を行った。また着磁中の超電導体の破壊を防ぐ機械的補強の最適化設計を応力解析シミュレーションにより行った。
2)GdBaCuOレンズ、MgB2円筒を用いたHTFML実証実験により、着磁磁場2.0 Tで3.55 Tの磁場を持続的に補足することを確認した。さらに、GdBaCuOレンズとGdBaCuO円筒を用いて、”lose contact method”により着磁磁場7 Tで9.8 Tの定常磁場を実現した。HTFML構造は印加磁場よりも大きな捕捉磁場の実現以外に、非常に大きな磁場勾配を実現することを数値シミュレーションで明らかにした。
3)GdBaCuO円筒バルクとGdBaCuOスリットバルクを組み合わせ、水滴の磁気浮上も可能な非常に大きな磁場勾配を実現する高勾配超電導バルク磁石(HG-TFM)を提案し、電磁界及び応力解析シミュレーションによる構造の最適化を行った。さらにHG-TFMの実証実験を行い、磁気力場が-1930 T2/mという水滴の磁気浮上も可能な大きな磁場勾配を得た。

  • Research Products

    (16 results)

All 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (8 results) (of which Int'l Joint Research: 7 results,  Invited: 3 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] University of Cambridge(英国)

    • Country Name
      UNITED KINGDOM
    • Counterpart Institution
      University of Cambridge
  • [Journal Article] Possibility of mechanical fracture of superconducting ring bulks due to thermal stress induced by local heat generation during pulsed-field magnetization2022

    • Author(s)
      Motoki Shinden, Hiroyuki Fujishiro, Keita Takahashi and Mark D Ainslie
    • Journal Title

      Supercond. Sci. Technol.

      Volume: 35 Pages: 045015(1)-(10)

    • DOI

      10.1088/1361-6668/ac5785

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Validation of a desktop-type magnet providing a quasi-microgravity space in a room-temperature bore of a high-gradient trapped field magnet (HG-TFM)2022

    • Author(s)
      K. Takahashi, H. Fujishiro and M. D. Ainslie
    • Journal Title

      Supercond. Sci. Technol.

      Volume: 35 Pages: 054003(1)-(11)

    • DOI

      10.1088/1361-6668/ac5fe3

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A conceptual study of a high gradient trapped field magnet (HG-TFM) providing toward a quasi-zero gravity space on Earth2021

    • Author(s)
      K Takahashi, H Fujishiro and M. D. Ainslie
    • Journal Title

      Supercond. Sci. Technol.

      Volume: 34 Pages: 035001(1)-(13)

    • DOI

      10.1088/1361-6668/abd386

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Experimental realization of an all-(RE)BaCuO hybrid trapped field magnet lens generating a 9.8 T concentrated magnetic field from a 7 T external field2021

    • Author(s)
      K. Takahashi, H. Fujishiro, S. Namba and M. D. Ainslie
    • Journal Title

      Supercond. Sci. Technol.

      Volume: 34 Pages: 05LT02(1)-(9)

    • DOI

      10.1088/1361-6668/abeb01

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Modelling higher trapped fields by pulsed field magnetisation of composite bulk MgB2 superconducting rings2021

    • Author(s)
      V. Cientanni, M. D. Ainslie, H. Fujishiro, K. Takahashi
    • Journal Title

      Supercond. Sci. Technol.

      Volume: 34 Pages: 114003(1)-(13)

    • DOI

      10.1088/1361-6668/ac2621

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 内径拡大させた中空円筒型REBaCuO超伝導バルク体のパルス着磁特性2021

    • Author(s)
      新田基己、藤代博之、内藤智之
    • Organizer
      2021年度春季低温工学・超電導学会
  • [Presentation] Modelling the record trapped field by pulsed field magnetisation of a composite bulk MgB2 superconducting ring2021

    • Author(s)
      Vito Cientanni, Mark Ainslie, Hiroyuki Fujishiro, Keita Takahashi
    • Organizer
      EUCAS2021
    • Int'l Joint Research
  • [Presentation] Pulsed field magnetization of GdBaCuO supercinducting bulks with high magnetization efficiency using split type coil with soft iron yoke2021

    • Author(s)
      M. Shinden, D. K. Nambri, K. Takahashi, H. Fujishiro and M. D. Ainslie
    • Organizer
      27th International Conference on Magnet Technology (MT27)
    • Int'l Joint Research
  • [Presentation] The influence of local heat generation in REBaCuO ring bulk with large bore on the mechanical fracture during pulsed-field magnetization2021

    • Author(s)
      M. Shinden, K. Takahashi, H. Fujishiro and M. D. Ainslie
    • Organizer
      7th International Conference on Magnet Technology (MT27)
    • Int'l Joint Research
  • [Presentation] Validation of a high-gradient trapped field magnet with an open bore providing a quasi-micro gravity space on Earth and its application for magnetic levitation2021

    • Author(s)
      K. Takahashi, H. Fujishiro and M. Ainslie
    • Organizer
      27th International Conference on Magnet Technology (MT27)
    • Int'l Joint Research
  • [Presentation] The hybrid trapped field magnet as a desktop-type magnetic field source providing a quasi-microgravity space on Earth: concept and validation2021

    • Author(s)
      K. Takahashi, H. Fujishiro and M. Ainslie
    • Organizer
      34th International Symposium on Superconductivity (ISS2021)
    • Int'l Joint Research / Invited
  • [Presentation] Validation of a quasi-microgravity space exploiting a high-gradient trapped field magnet (HG-TFM) as a desktop-type magnetic field source2021

    • Author(s)
      K. Takahashi, H. Fujishiro and M. D. Ainslie
    • Organizer
      International workshop on processing and applications of superconducting bulk materials (PASREG2021)
    • Int'l Joint Research / Invited
  • [Presentation] Experimental validation of a Hybrid Trapped Field Magnet Lens (HTFML) using all-REBaCuO bulks2021

    • Author(s)
      H. Fujishiro, K. Takahashi, S. Namba and M. D. Ainslie
    • Organizer
      nternational workshop on processing and applications of superconducting bulk materials (PASREG2021)
    • Int'l Joint Research / Invited
  • [Remarks] 藤代・内藤研究室ホームページ

    • URL

      http://ikebehp.mat.iwate-u.ac.jp

  • [Patent(Industrial Property Rights)] 超伝導バルク磁石装置2022

    • Inventor(s)
      髙橋圭太
    • Industrial Property Rights Holder
      学校法人学習院
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      特願2022-33288

URL: 

Published: 2022-12-28  

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